The movie is very inaccurate when it comes to the police investigation routines and the laws of physics. Since I don’t have much time I will explain as shortly and fast as I can. In the first scene we see the detective without wearing gloves, hair protection, a mask, a suit, or feet protection. We also see the assistant detective drinking something; drinking anything is not permitted at a crime scene as it can contaminate the scene; the assistant detective wasn’t wearing any gear either. Later we see the patrol officer walking into the crime scene without a doubt on the mind, nevertheless wearing more gear than the actual detectives as he is wearing gloves (at least). Moving on, Harley goes to the police station to look for Cass where she points a quirky looking gun at a cop behind a desk. The cop does not activate an alarm indicating there was an emergency no, he just sits there to wait for his death. Right after this we see two guards chatting next to the person who just got shot. They also get shot. I’m gonna skip to the most stupidest part of the movie. At one point Harley is on roller skates in front of a moving car. She decides to backflip onto the roof of the car where the roller skates decide to take a break and stop rolling. So instead of Harley rolling off the hood to her death, she makes a perfect landing.